CHART MVE Fusion, Technical Manual, Page: 4 / 51

20994124 REV A  4
2 Safety
READ BEFORE OPERATING THIS EQUIPMENT
General
Liquid nitrogen (LN2) is used in MVE Fusion Freezers as a refrigerant. Understanding
and following certain safety precautions is extremely important when handling LN2 and
cryogenic containers (commonly referred to as dewars).
Liquid Nitrogen Properties
Nitrogen is a colorless, odorless, tasteless gas. Gaseous nitrogen makes up about 78%
of the Earth’s atmosphere by volume. Once collected, cooled and isolated, nitrogen can
be liquefied.
Boiling Point at 1 atmosphere -195.8°C , -320.3°F , 77.4 K
Thermal Conductivity (Gas) 25.83 mW/(m·K)
Heat of Vaporization (Liquid) 198.38 kJ/kg
Liquid density at 1 atmosphere 1.782 lbs/L , 807.4 g/L , 808.6 kg/m3
Liquid Nitrogen Safety
Transferring LN2 and operating the MVE Fusion should be done in accordance with the
manufacturer/supplier instructions. It is important that all safety precautions
recommended by the manufacturer be followed.

WARNING: Do not modify this equipment without authorization
of the manufacturer.

Nitrogen vapor is a potential asphyxiant as it displaces Oxygen
(O
2
) in confined spaces. Rapid suffocation can occur without
warning in an Oxygen-deficient atmosphere (less than 19.5%